Filtering device



Jan- 29, 1957 w. W. MCMULLEN `ET AL FILTERING DEVICE Filed April 8. 1953 2 Sheets-Sheet l 'ATTORNEY w. w. MCMULLEN Erm. 2,779,431

Jan. 29, 1957 FILTERING DEVICE 2 Sheets-Sheet 2 Filed April 8, 1953 FILTERING DEVICE Wesley W. McMullen and `loseph N. Heller, Flint, Mich., assignors to General Motors Corporation, Detroit, Mich., a corporation of Delaware Application April 1953, Serial No. 347,554

6 Claims. (Cl. 18S-15) This invention relates generally to air cleaners and other similar devices and particularly to filtering, bafiiing, and securing means adaptable for use with such devices.

Arr cleaning and other devices employed on engines, air compressors, and other apparatus used with earth moving, construction, farm, military and similar `equipment are subject to unusually severe operating conditions. Such devices are subject to excessive shocks and vibrations and to varying operating positions which tend to disassemble and render inoperative those devices which are not properly constructed. Such devices are also subject to excessive dust and foreign matter usually found in the air during the operation of such equipment and as a result require frequent servicing while the equipment is still in use.

It is now proposed to provide a device which will not be made inoperative asa result of the severetreatment received during the operation of such equipment. It is intended to provide air baffling and filtering means to remove foreign matter and dust from the air used by such devices and to provide fastening means which will rigidly secure these elements in operative position but which peri mit their removal and `replacement when required.

In the drawings: j

Figure l is a side elevational view of an air cleaner partially broken away and cross-sectioned to more clearly show the removable filter element and the baffling and fastening means embracing the invention.

Figure 2 is a cross-sectional view of the air cleaner as taken in the plane of line 2 2 of Figure 1, viewed in the direction of the arrows thereon. The baffling means is partially broken away to more clearly show certain structural features thereof.

Figure 3 is an enlarged fragmentary view of the air cleaner showing` in more detail the means employed for removably securing the filter element within the air cleaner.

Figure 4 is a perspective view of the fastener adapted to be secured to the air cleaner for removably securing the filter element therein. t

The air cleaner in the accompanying drawings comprises a casing which includes a filter housing member formed by a cylindrical shell 23 disposed about and secured to a sleeve 14 which in the present instance and for the convenience of manufacture is made of sections 15 and 17. The sleeve 14 is enlarged at one end 26 to form part of the housing and the remainder of the sleeve is spaced inwardly from the cylindrical shell 28 to form an annular inlet passage 16. The annular passage 16 communicates with a plurality of openings 30 formed through the cylindrical shell 28 to provide for the induction of air into the passage and through the filter housing.

The sleeve 14 of the filter housing 10 has filter elements 18 and 20 positioned therein adjacent one another.` The filter element 18 is formed of material loosely wound or collected to form a filter body disposed withinthe sleeve 14 nearthe upper end thereof. The other filter element 20 is formed as a filter cartridge 32 adapted to atent C) be removably secured within the lower end of the sleeve 14.

Spring fasteners or resilient elements 36 are adapted to be secured to the sleeve 14 to removably secure the cartridge 32 within the sleeve. The fasteners 36 are formed from spring plate members 3S :reversely bent to provide two substantially parallel legs 4t) and 42 adapted to receive and engage the end 34 of the sleeve 14. Apertures 44 are formed through the sleeve 14 at positions around the sleeve where the fasteners are to be secured. Tabs 46 are struck from the legs 40 of the fasteners toward the legs 42 and are extended through the apertures 44 in the sleeve to secure the fasteners thereto. Tongues 48 also are struck from the legs 40 in such a way as to extend into the sleeve 14. Tongues 48 engage an annular shoulder 50 formed about the cartridge 32 to secure the cartridge in removable position within the sleeve 14.

The air cleaner casing also includes a. liquid container member 12 adapted to be fastened to the filter housing member 10 adjacent the end 34 of the sleeve 14and in spaced relation to the cartridge 32. Although any suitshoulder 52 on which a bafiie plate 22 is mounted. The" bafile plate 22 is formed to provide an annular pan 23 about the liquid container 12 which slopes upwardly at its inner edge towards the filter cartridge 32 as is indicated at 54.

A baiiie disc 24 is centrally secured to the filter cartridge 32 and is sloped downwardly and outwardly therefrom toward the inner edge of the bafiie plate 22. A plurality of spaced projections 56 are formed on the outer edge of the baffle disc 24 and are adapted to engage the anged inner edge of the baffle plate 22 to provide a plurality of outlet openings 58 between the bafiies and to support the filter cartridge 32 and bafiie disc 24 in spaced relation to the baliie plate.

The liquid container 12 is formed to provide a sump 2S adapted to contain a liquid at a level 59. The liquid covers the baffle plate 22 and is adapted to liow through an aperture 60 formed in the` baflie plate to lill the annular pan 23.

Assuming that the liquid container 12 is removed and that the filter element 18 is disposed within the filter housing 10, the cleaner is assembled by securing the fasteners 36 to the end 34 of the sleeve 14 and by placing the cartridge 32 within the sleeve in engagement with the fasteners. liquid and positioned against the filter housing 1t) in such a way that the bafe plate 22 engages the baffle disc 24 and the `flange 62 of the container l12 engages the gasket 64 of the filter housing 1t). The fasteners 36,`cartridge 32, and bafiies 22 and 24 are held in secure engagement against excessive shocks and vibrations which normally tend to cause rattling and disassembly by means of toggle clamps 66 firmly securing the liquid container 12 to the filter housing 10.

The air cleaner is adapted to be installed on an engine or other .apparatus by connecting the air outlet opening 68 formed through the filter housing "19 to the air intake side` ofsuch apparatus. Air enters tlreintake openings 3l) of the air cleaner and flows into the inlet passage 16, then downwardly against the pan 23 and upwardly into the filter elements 20 and 18 housed in the sleeve 14. The air traveling through the inlet passage 16 strikes the liquid filled pan 23 and deposits in the liquid some of the dirt and foreign matter carried in the air. The force The liquid container 12 is then filled with UNITED STATES PATENTS Larsen Mar. 11, 1941 Hallerberg Aug. 5, 1941 Myers Aug. 19, 1941 Hallerberg et a1 Jan. 13, 1942 Beatty et al Aug. 20, 1946 Kliefoth July 4, 1950 Newcum June 12, 1951 6 Holt t al Dec. 9, 1952 West Jan. 20, 1953 Poupitch Mar. 31, 1953 Sebok Ian. 12, 1954 Sebok May 31, 1955 FOREIGN PATENTS Great Britain May 11, 1942 

